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24 Cards in this Set
- Front
- Back
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What is the crust made up of |
Silicate rock |
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What is the mantle made up of |
Denser silicate rock what |
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What is the core made up of |
Iron and nickel Liquid outer core and solid inner core Due to chemical composition |
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Subsystems are also known as |
Geosystems |
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What are the 3 major global geosystems |
The climate system (atmosphere, hydrosphere, cryosphere, biosphere, lithosphere) The plate tectonic system (Interactions among earths solid components) The geodynamo (interactions within earth's core) |
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What are tectonic plates driven by |
Convection in the mantle |
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When was earth formed |
4.56 billion years ago |
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How old is liquid water |
3.8 billion years old |
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When were rocks found with life and magnetic field? |
3.5 billion years ago |
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Asthenosphere |
Portion of mantle below the lithosphere Moldable solid |
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Geology |
The branch of earths science that studies all aspects of the planet |
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Goal of geology |
Explain the physical universe |
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Scientific method |
General procedure for discovering how the universe works through systematic observations and experiments |
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Scientific model |
Precise representation of how a natural system behaves |
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Geologic record |
Information preserved in the rocks that have been formed at various times throughout earth's history |
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Principle of uniformitarianism |
The processes we see in action on earth today have worked in much the same way throughout the geologic past |
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Geodesy |
A very old branch of earths science that studies earths shape and surface |
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Seismic waves |
Vibrations from earthquakes |
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Convection |
Process which hotter material rises and cooler material sinks |
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Convection |
Process which hotter material rises and cooler material sinks |
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Plate tectonic system |
The convicting mantle and its overlying mosaic of lithospheric plates constitute it |
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Where's the magnetic field |
Liquid outer core |
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Geodynamo |
Electromagnet |
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Geologic dark ages |
Early period of earths history when meteorites were constantly smashing into it |
